Question

Worth 20 pts!!
The equation of a circle is ​ (x−11)2+(y+15)2=144 ​ .

What is the circle's radius?

Enter your answer in the box.

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Answer 1

The radius of a circle is always the square root of the number on the right. The other two numbers describe the center.
Center: (11,-15) Opposite of what's in the brackets.
Radius: sqrt(144) = 12